Masaaki Hayami

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Okayama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Rewritable photochromic optical disk
- Patent number 5,252,371
- Issue date Oct 12, 1993
- Pioneer Electronic Corporation
- Hitoshi Taniguchi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Novel skin-whitening agent
- Patent number 4,771,060
- Issue date Sep 13, 1988
- Teikoku Seiyaku Kabushiki Kaisha
- Yoshinori Nakagawa
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Styryl-like compounds showing a color-developing and bleaching beha...
- Patent number 4,380,629
- Issue date Apr 19, 1983
- Matsushita Electric Industrial Company, Limited
- Akio Yamashita
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Indolins styryl-like compounds
- Patent number 4,314,058
- Issue date Feb 2, 1982
- Matsushita Electric Industrial Co., Ltd.
- Masaaki Hayami
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Method of preparing styryl-like compounds
- Patent number 4,147,862
- Issue date Apr 3, 1979
- Matsushita Electric Industrial Co., Ltd.
- Masaaki Hayami
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Apparatus for changing color
- Patent number 4,139,274
- Issue date Feb 13, 1979
- Matsushita Electric Industrial Co., Ltd.
- Akio Yamashita
- G02 - OPTICS